Refactor BackingThreadHolder to WorkletBackingThreadHolder

third_party/WebKit/Source/core/workers/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("workers") {
   sources = [
     "AbstractWorker.cpp",
     "AbstractWorker.h",
@@ skipping 55 matching lines @@
     "WorkerSettings.cpp",
     "WorkerSettings.h",
     "WorkerThread.cpp",
     "WorkerThread.h",
     "WorkerThreadLifecycleObserver.cpp",
     "WorkerThreadLifecycleObserver.h",
     "WorkerThreadStartupData.cpp",
     "WorkerThreadStartupData.h",
     "Worklet.cpp",
     "Worklet.h",
+    "WorkletBackingThreadHolder.cpp",
+    "WorkletBackingThreadHolder.h",
     "WorkletGlobalScope.cpp",
     "WorkletGlobalScope.h",
     "WorkletScriptLoader.cpp",
     "WorkletScriptLoader.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }